Pump.



Patented Apr. 22, 1919.

2 SHEETS--SHEET I.

E. P. LARSH.

PUMP.

APPLICATION FILED FEB-12.1916.

amvemtom E. P. LARSH.

PUMP.

I APPLICATION FILED FEB-12' 1916.

.mlifllllillllg 2 M MO MWS? QM)! m #2 WM Patented Apr. 221919.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

EVERETT P. LARSH, OF DAYTON, OHIO, ASSIGNOR TO THE BURNETT-LARSHMANUFACTURING COMPANY, OF DAYTON, OHIO, A CORPORATION OFOHIO.

PUMP.

Application filed. February 12, 1916.

To all whom it may concern.-

Be it known that I, EVERETT P. LARSI-I, citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Pumps, of which thefollowing is a specification.

My invention relates to pumps and more particularly to that type ofpumps commonly known as force pumps especially adapted for use inprivate water distribution systems but also capable of use as bilgepumps for drainage and for other purposes.

The object of the invention is to simplify the structure as well as themeans and mode of operation of such devices whereby they will not onlybe cheapened in construction, but will be more efiicient in use,positive in operation, easily controlled, and unlikely to get out ofrepair.

A further object of the invention is to provide improved means forautomatically priming the suction valves whereby they will be maintainedin operative condition throughout extended periods of non-use.

With the above primary and other incidental objects in. view, as willmore fully appear in the specification, the invention consists of thefeatures of construction, the parts and combinations thereof, and themode of operation, or their equivalents as hereinafter described and setforth in the claims.

Referring to the drawings, Figure 1 is a longitudinal sectional view ofthe assembled ump. Fig. 1 is a detail sectional view of the pitman. Fig.2 is a transverse sectional view through the crank casing illustratingthe crank shaft and the automatic oiling devices. Fig. 3 is a transversesectional plan view through the intake valve chambers on line :vae ofFigs. 1 and 4. Fig. 4 is a vertical sectional view on line g 1 of Figs.1 and 3. Fig. 5is a vertical sectional view of a modification of thevacuum chamber. Figs. 6,7, and 8 are modifications of the bypass orrelief port construction showing same valved. I

Like parts are indicated by similar characters of reference throughoutthe several views. t

In the drawings, the invention forming the subject matter hereof hasbeen shown Specification of Letters Patent.

Patented "Apr. 22, 1919.

Serial No. 78,081.

embodied in a pump of the horizontal type.

It is to be understood, however, that the features of invention are notlimited to this type of pump but may be embodied in pumps of vertical orother types. Such embodiment in pumps of other types, being. within theskill of ordinary mechanics skilled in pump manufacture andconstruction, have not been illustrated in the present drawings but areto be understood as included in the scope of the present invention.

In constructing the pump forming the subject matter hereof there isemployed a main frame having at one end a crank casing or housing 1 inwhich are inclosed the actuating parts of the structure while at theopposite end of the main frame is located the pump body 2 inclosing thecylinder and valve mechanism.

Mounted in suitable bearings extended laterally from the crank casing 1is a crank shaft 4 carrying at its outer end a wheel 5 which serves as abalance or'fly wheel and in the event the pump is driven by an electricor other high speed motor this wheel 5 may be employed as a drivingpulley.

The sliding head 18 is connected with the usual piston rod 19 to whichis secured the pump piston 20. The pump piston'20 is reciprocated by therotation of'the crank 12,

ner as to form about the exterior of the pump cylinder 21 an annularintake chamber 22. This intake chamber 22 communicates through astrainer or filter 23 and the vacuum chamber 24 with the supply lineleading from the cistern, well or other source of supply.

Before reaching the filter or screening member the supply of Water isdrawn through the vacuum chamber 24: which comprises a verticallydisposed housing or dome having therein an interior wall or septum,dividing the chamber or dome into two intercommunicating passages, anascending passage 29 and a descendingpassage 30.

The interior of the pumpin head or body 2 immediately above the inta echamber 22 and cylinder 21 is divided by a medial wall 33 into twopulsation or pump chambers, 34- and 35, communicating through downwardextensions of said chambers with opposite ends of the cylinder 21.Leading from the intake chamber 22 to the chambers 34 and 35 are ports36 and 37 respectively each of which is controlled by an independentlyop-- erated valve 38 and 39. These valves are of the suction type andmay be of any suitable form. In the drawing they have been illustratedas comprising disks 40 movable vertically upon stems 41 against thetension of springs 42. The form of valve shown in the drawings is onecommonly used in pumps of this character and inasmuch as the valve doesnot form any part of the invention, per se, it need not be heredescribed in de tail. The construction is such that as the piston 20 isreciprocated within the cylinders the valves 38 and 39 will bealternately lifted against the tensionof the springs 42 to draw a chargeof fluid from the intake chamber 22 through the corresponding port 36 or37 into the chamber 34 or 35 and thence [into the corresponding end ofthe cylinder 21. Located above the pulsation chambers 34 and 35 is adischarge chamber 43 separated from the chambers 34 and 35 by thedischarge valve plate or deck 44 having therein ports 45 and 46communicating with the chambers 34 and 35 respectively. Each of theports 45 and 46 is controlled by an independently operated valve 47 and48 of a construction similar to that of the suction or intake valvesbefore referred to. The discharge chamber 43 is extended upward to forma dome or. air chamber 49.

The construction is such that as the crank 12 rotates in the directionindicated by the arrow in Fig. 1 the piston 20 will be moved toward theright within the cylinder 21 thereby causing the valve 39 to be elevatedoff its seat against the tension of its spring 42 to admit a charge ofwater from the intake hamber 22 through the port 37 to the chamber 35and thence into the open right hand end of the cylinder 21. At the sametime the movement of the piston 20 toward the left discharges the waterpreviously drawn into the left hand end of the cylinder through thevalve 38, outward through the chamber 34 and thence through the port 45forcing the valve 47 off its seat agamst the tension of its spring anddischarging the water into the chamber 43. The direction of movement ofwater in this operation is indicated by darts in Fig. 1;

Upon reversal of the movement of the piston the operation of drawing inand discharging a charge of water isrev'ersed and the water is drawnfrom the intake chamber 22 into the cylinder 21 through the valve 38 andchamber 34 and is discharged from the cylinder on the opposite side ofthe piston 20 through the chamber 35 and valve 48 into the dischargechamber 43.

Substantially coincident with the plane of the chambers 34 and 35 is aWell or cistern 50 shown in detail inFigs. 3 and 4 with which the outletconduit 51 communicates. It has been customary heretofore to connect thedischarge conduit directly with the discharge chamber 43 whereby thedisconnection of the conduit was essential to afford access to thevalve. It will be seen in the present construction that the hood orhousing forming the discharge chamber 43 is entirely independent of thedischarge conduit 51 and may be removed to afford access to the valves47 and 48 or by removal of said valves access through the ports 45 and46 to the suction valves 38 and 39 without the necessity ofdisconnecting the discharge conduit.

T0 at all times water 7 seal the suction valves 38 and 39 or toautomatically prime said valves there are provided in the vertical wallsseparating the chambers 34 and 35 from the well or cistern 50horizontally disposed ports 52 and 53 which are preferably permanentlyopen to permit the free flow of water in return direction from the wellor cistern 50 into the chambers 34 and 35 when the pump is at rest toinsure the proper priming or water sealing of the suction valves 38 and39. The small quantity of water which may pass through these ports fromthe chamber 34 or 35 into the outlet cistern 50 under the influence ofthe piston is a negligible quantity as is also the quantity which may bedrawn through said ports into said chambers upon the suction stroke ofthe piston. By arran ing them in horizontal position the possibility ofthe ports being cloggedby sediment or scale is reduced to minimum. I amawarethat heretofore it has not been unusual to provide such ports inthe discharge valve plate or deck as for instance in the deck 44 betweensaid chambers and the discharge chamber 43 or in some instances portshave been'prov'ided in the rim of the discharge valve seat or throughthe body of the valve itself. However, such ports when located in avertical position are found objectionable and are also quite likely tocollect sediment when located adjacent to the bottom of the dischargechamber. However, these difiiculti es are overcome in th presentinstance by locating the relief and priming ports below the level of thedischarge valve deck and in a horizontal position. To further guardagainst the lodgment of sediment the ports 52 and 53 are preferablylocated in small tapered or conical nozzles 54 inserted horizontally inthe vertical walls of the chambers 34 and 35.v 1

These ports are quite small in size.

The well orcistern in which the ports are located Whetherv horizontallydisposed or otherwise serves to collect adjacent to the port and so makeavailable the last remain ing supply of water. The valy es are thus keptprimed for a greater period of time and even a minute quantity-offwaterremaining will be availabl for this purpose.

The-ports52 and 53 have heretofore been described as permanently opencomprisingeither merely holes or ducts drilled in the walls between thechambers 34; and 35 and the cistern 50 or open ducts in nozzles 54inserted in said wall. It is to be understood that if so desired theseports may be valved. In Fig. 6 there is shown a detail sectional view inwhich the nozzles 54: are chambered to provide Seats for ball valves 66which will close the ports 52 and 53 against the passage of fluid in onedirection. As shown in this figure the valved ports will permit theentrance of water from the cistern 50 to the chambers 34 and 35 insufficient quantity to prime the valves but on the compression stroke ofthe piston the ball valve 66 will seat itself to prevent the escape ofWater from the chamber 3% or 35 through the ports before mentioned.

In Fig. 7 there is shown a modified valved construction employing an airvalve operating in one direction and a Water valve operating in theother direction. It will be understood that there will be provided two"alved ports, an air port and a water port, for each chamber 34 and 35.

In Fig. 8 there is shown a further modification in which a duct 67leading from the cistern 50 communicates through a port 68 with onechamber and through the port 69 with the other chamber. These ports areadapted to be closed by a double valve member 70 comprising a screwthreaded stem having two beveled shoulders 71 and 72 adapted to engagethe seats 7 3 and 74 in the counterbore of the duct 67. In thisconstruction the valve stem may be operated to open the ports 68 and 69for either the escape of entrained air or the admission of primingfluid. This construction may also be employed in conjunction with thatshown in Fig. 6.

From the above description it will be apparent that there is thusprovided a device of the character described possessing the particularfeatures of advantage before enumerated as desirable but which isobviously susceptible of modification in its :Eorm, proportion, detailconstruction. or arrangement of parts without departing from theprinciple involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has beendescribed in language more or less specific as to certain structuralfeatures, it is to be understood that the inventioir is not limited toany specific details, but that the means and construction hereindescribed comprise but one mode of putting the invention into efiect,and the invention is therefore claimed broadly in any of its possibleforms or modifications within the scope of the appended claims.

Having thus described my invention I claim:

1. The combination of a pump having a pulsation chamber and a dischargechamber intercommunicating through a main valved discharge port, and avertical wall separating portions of said pulsation and dischargechambers and having therein a permanently open intercommunicating portindependent of said main valved port, substantially as and for thepurpose specified.

2. The combination of a pump having a pulsation chamber and a dischargechamber intercommunicating through a main valved discharge port, and awell or cistern communicating with the discharge chamber and adapted tocollect fluid therefrom and having a substantially horizontally disposedport independent of said main valved port forming an intercommunicationbetween the well or cistern and the pulsation chamber, substantially asand for the purpose specified.

3. The combination of a pump having a pulsation chamber'and a dischargechamber intercommunicating through a main valved discharge port, saidchambers being extended into horizontal relation one with the other andhaving a horizontally disposed intercommunicating port connecting thehorizontally related portions of said chambers independent of said mainvalved discharge port.

4.. The combination of a pump having a pulsation chamber and a dischargechamber intercommunicating through a main valved discharge port, saiddischarge chamber having a dependent portion or collecting reservoir.and having a horizontally disposed intercommunicating port connectingsaid dependent portion or reservoir with the pulsation chamber.

5. The combination of a pump having a pulsation chamber and a dischargechamber intercommunicating through a main valved dischar e port. saidchambers having a substantially horizontally disposed intercommunicatingpassage independent of said main valved discharge port located below thelevel of said main valved discharge port, substantially as specified.

6. The combination with a pump having a ulsation chamber and a dischargechamber mter'communicating through a main valved discharge port, thedischarge chamber hav- In testimony whereof, I have hereunto set mg inthe bottom thereof a depression or my hand this 9 day of February A. D.1916. collecting cistern for the residue of fluid therein, and anintercoinlnunicating port be- EVERETT P. LARSH. 5 tween said depressionor cistern and the pull/Vitnesses:

sation chamber substantially as and for the C. E. BURNETT,

purpose specified. M. C. ROYER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

